In the morning, blood flow to the small intestine will be increased to transport the absorbed nutrients to the liver and then to the rest of the body. Excess glucose will be stored in the liver, muscle cells and adipose tissue. During the walk to work, the cardiovascular system will respond by increasing the heart rate to source oxygen and glucose to the muscle cells. If the nature of the work requires a lot of physical activities, the cardiovascular system will respond in the same way. However, the heart rate will reduce during rest periods (Daniels, 2012, p. 244).
In the afternoon, the cardiovascular system will respond to the food intake by supplying more blood to the small intestine to facilitate absorption of nutrients. Excess amino acids will be broken down in the liver and the wastes transported to the kidney for excretion while the rest will be transported to the cells which require them. During the snack after lunch, more fluid will be absorbed in the colon and kidneys to replace fluids lost during the day. In the evening, the cardiovascular system will respond to the exercise training and walk by increasing blood flow to the muscle cells. Increased supply replenishes the lost water and electrolytes in the muscles, thus preventing rapid muscle fatigue. During supper, the blood supply will be concentrated on the digestive tract to facilitate absorption of nutrients from the small intestine and water from the colon.
The digestive system also plays an important role during the day. Its main function is to break down complex food particles to simpler forms that can be easily absorbed in the body. In the morning, blood glucose levels are low due to the night spent without food intake. As a result, the stomach will send signals to the brain to stimulate hunger. After the food has been ingested, digestion will take place, and the body will absorb the glucose from the breakfast meal to be used as a source of energy for